عنوان مقاله [English]
In this article, an analytical method for detecting the need for pressure feedback is introduced in controlling the position of the hydraulic actuator’s piston. The geometric location of the roots is used to do this. In this method, with the appropriate conversion function for the actuator, the effect of changing the position and pressure feedback parameters on the location of the close loop system poles and thus its bandwidth and relative damping is examined and based on it. First, the use of pressure feedback or no need for it is specified, and in the second, a guideline for designing pressure feedback is provided when necessary. By presenting this analytical method, it is first saved at the costs of preparing pressure sensors, locating and installing them, as well as pressure feedback parameters in unnecessary times, and secondly, a specified instruction for the design of the pressure feedback on times of use is extracted from it. Finally, by introducing and simulating three samples with dynamic characteristics and different conditions, the accuracy of the diagnosis and design method presented to control these types of operators is described.